Presentation on theme: "Done by: Sara Al-Khater 7D Science. The element is a substance that is made out from one type of atoms. element is a pure substance that cannot be."— Presentation transcript:
The element is a substance that is made out from one type of atoms. element is a pure substance that cannot be broken down into any simpler substances by chemical methods. Some elements: Iron (Fe) Gold (Au) Hydrogen (H) Carbon (C) Oxygen (O) Helium (He)
A compound is made up of two or more types of elements (e.g. water and carbon dioxide) that are chemically combined in a set ratio. They cannot be broken down into two or more simpler substances. These are some compounds: Water (H 2 O) Carbon dioxide (CO 2 ) Ammonia (NH 3 ) Methane (CH 4 ) Glucose (C 6 H 12 O 6 )
A mixture is what you get when you combine two substances in such a way that no chemical reaction occurs between the components and you can separate them again. These are some mixtures: sand and water salt and water sugar and salt
The periodic table is a tabular display of the Chemical elements are organized configurations, and chemical properties. Elements are presented in increasing atomic number. The main body of the table grid is 18×7.